To absorb means to soak up or take something in. When you spill juice on the counter, a paper towel absorbs the liquid, drawing it into its fibers until the counter is dry again. A sponge absorbs water. Soil absorbs rain. Your skin absorbs sunlight, which your body uses to make vitamin D.

The word also describes taking in information or ideas. When you're completely focused on reading a fascinating book, you're absorbed in the story, your mind soaking up every detail. A student might absorb new math concepts during a clear explanation, or absorb facts about ancient Egypt while watching a documentary. Being absorbed in something means giving it your full attention, like being so focused on building with LEGO bricks that you don't hear someone calling your name.

Scientists use absorb to describe what happens when one thing takes in another thing and holds onto it. A black T-shirt absorbs more sunlight than a white one, which is why it feels hotter on a sunny day. Plants absorb carbon dioxide from the air and nutrients from the soil.

The opposite of absorbing something is reflecting or repelling it. A mirror reflects light instead of absorbing it. A raincoat repels water rather than letting your clothes absorb it.